Hammer with shock-resistant arrangement

Abstract

A hammer comprises a metal bar extended from a head, the bar including forward and rearward apertures; a soft sleeve including spaced lengthwise internal ribs, the ribs being fastened across the bar, forward and rearward staged holes disposed corresponding to the apertures respectively; two forward fastening elements each including a catch inserted into one aperture for preventing the bar from disengaging from the sleeve; a rearward fastening assembly including a left fastener including a bore in a shank and spaced recessed rings around the bore and a right fastener including spaced collars on a shank thereof, the collars being disposed matingly with respect to the recessed rings so that the bar and the sleeve are fastened together by snapping the collars into the rings through the rearward staged hole and the rearward aperture; and a hard handle formed on the sleeve. The ribs and the sleeve can absorb shock.

What is claimed is:  
     
       1. A hammer comprising: 
       a metal body including a head and an elongate bar extended backward, the bar including a forward elliptical aperture and a rearward circular aperture;  
       an elongate soft sleeve formed of plastic, the sleeve including a plurality of spaced lengthwise ribs integrally formed around an inner surface, the ribs being fastened across the bar, a forward staged hole, and a rearward staged hole both disposed corresponding to the elliptical and the circular apertures respectively;  
       a pair of forward fastening elements each including a catch inserted into the elliptical aperture for preventing the bar from disengaging from the sleeve;  
       a rearward fastening assembly including a left fastener including a head, a shank, a bore in the shank, and a plurality of spaced apart recessed rings around the bore and a right fastener including a head, a shank, and a plurality of spaced apart collars on the shank thereof, the collars being disposed matingly with respect to the recessed rings so that the bar and the sleeve are fastened together by snapping the collars of the right fastener into the recessed rings of the left fastener through the rearward staged hole of the sleeve and the circular aperture of the bar; and  
       a hard handle formed on the sleeve;  
       whereby a shock caused by pounding an object by the hammer is substantially absorbed by the ribs and the sleeve.  
     
     
       2. The hammer of  claim 1 , wherein the sleeve is integrally formed. 
     
     
       3. The hammer of  claim 1 , wherein the sleeve is formed of two detachable identical members. 
     
     
       4. The hammer of  claim 1 , wherein the handle comprises a rear opening for exposing the head of either fastener. 
     
     
       5. The hammer of  claim 1 , wherein the sleeve further comprises at least one knurl on its outer surface for increasing a fastening of the sleeve and the handle. 
     
     
       6. The hammer of  claim 1 , wherein the pair of forward fastening elements are integrally formed with the sleeve.